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Abstract

Recent broadband observations by the SABER sensor aboard the TIMED satellite hint at intriguing new vibrationrotation
excitation and loss processes that occur in the energy dissipation of the ionosphere-thermosphere as it
responds to solar storms. To address the questions exposed by the SABER data, SDL's field-widened interferometer
has been brought back after three decades to again fly into or above aurorally disturbed atmosphere to gain the data
needed to better understand the different processes of ionosphere-thermosphere energetics. The paper discusses the
evaluation and design phases (laboratory evaluation, a rocket flight, and a satellite flight) needed to prepare this
elegant and unique interferometer to reach its goal of making high resolution (0.5 cm-1) and wide bandwidth (1300-
8000 cm-1) measurements of the ionosphere-thermosphere world-wide. Design details of interferometer will be
presented along with comparisons between a standard Michelson interferometer and the field-widened sensor to
illustrate just how the Bounchareine and Connes field-widened form provides the enhanced performance needed for
the new missions. The paper also describes how the improved Inferometer design will leverage advances in modern
electronics, detectors, bearing design and software to gain significant improvements in the performance of the
upgraded field-widened interferometer-spectrometer when compared to the heritage instrument.

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Journal of Applied Remote SensingJournal of Astronomical Telescopes Instruments and SystemsJournal of Biomedical OpticsJournal of Electronic ImagingJournal of Medical ImagingJournal of Micro/Nanolithography, MEMS, and MOEMSJournal of NanophotonicsJournal of Photonics for EnergyNeurophotonicsOptical EngineeringSPIE Reviews